Does gamma equal density in Kg/m^3?

• Parsifal1

Parsifal1

I want to use the equation:

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.

Parsifal1 said:
I want to use the equation:

Fr='gamma'*distance from centroid*Area

but the example is showing density in N/m^3

while I only have the density in kg/m^3

Does this mean I have to multiply it by 9.81 to get the right answer?

Thanks.
γ is known as the 'weight density' of a substance. γ = ρ ⋅ g, where ρ is the mass density and g is the acceleration due to gravity.

SteamKing said:
γ is known as the 'weight density' of a substance. γ = ρ ⋅ g, where ρ is the mass density and g is the acceleration due to gravity.
So, pgh is expressed in N/m^3 as opposed to Kg/m^3?

Parsifal1 said:
So, pgh is expressed in N/m^3 as opposed to Kg/m^3?
No. Re-read Post #2 again carefully and then work out the units of ρgh versus just ρg.